Question

Given that: Sin A = a/b, then cos A = ?​

Answer 1

Answer:

c/b

Step-by-step explanation:

As we know

Sin theta is the ratio of the opposite side of the angle to the hypotenuse of the triangle.

So, if Sin A is a/b then a is the opposite side and b is the hypotenuse.

As we know

Cos theta is the ratio of the adjacent side of the angle to the hypotenuse.

As a is the opposite side, and b is the hypotenuse, we get

Cos A = c/b

I hope this clarifies your doubt.